Wilmer s



(No Model.)

W. S. LAMB "8v W. P EMMERT. SWEEP ATTAGHMBNTFQR HORSE POWERS.

No. 428,615. Patented May 27, 189Q.

WITNESSES: INVE/VTUP MM g 0% I. v ATTORNEY-S I UNITED STATES PATENT QFFICE.

IVILMER S. LAMB AND WVILLIAM P. EMMERT, OF FREEPORT, ILLINOIS; SAID EMMERT ASSIGNOR TO SAID LAM-l3.

SWEEP ATTACHMENT FOR HORSE-POWERS.

SPECIFICATION forming part of Letters Patent No. 428,615, dated May 27, 1890.

Application filed Septembe 25, 1389. Serial No. 825,033. (No model.)

To all whom it may concern.- would be equally adapted to be combined with Be it known that we, VVILMER S. LAMB and our invention, which is hereinafter explained VVILLIAM P. EMMERT, residents of Freeport, and described. in the county of Stephenson and State of Illi- The shellD is provided with two oppositely- 5 nois, have invented certain new and useful placed lugs E E, a sweep-bar F being pivoted Improvement-s in Sweep Attachments for to-the lugE by abolt e, or otherwise. On one Horse-Powers; and we do hereby declare the side of the free end of the sweep is fastened following to be a full, clear, and exact descripany suitable device for the attachment of a tion of the invention, such as will enable horse or horses, and from the opposite side [0 others skilled in the art to which it pertains thereof a brace-rod F extends to the lug E, to make and use the same. in a line oblique to the sweep-bar F. The Our invention relates to improvements in outer end of the rod F is suitably fastened to sweeps for-grinding-mills, and is fully dethe sweep-bar and its inner end is fastened scribed and explained in this specification, to the lug E in any way adapted to offer a I5 and shown in the accompanying drawings, in yielding resistance to tensile strain upon the Which brace-rod. This fastening may have various Figure 1 is a view partly in top plan and forms, but that shown in the figure is simple, partly in horizontal section illustrating a mill substantial, and compact, and clearly illusprovided with our improved sweep. Fig. 2 is tratesour invention. In this construction f 20 a top plan of a portion of the brace-rod formis a vertical flange formed on the margin of ing a part of the sweep and the parts conthe lugE. f isawasher encircling thebracenecting the brace-rod with the rotating elerod near its end and adjustable by means of ment of the mill. a nut N on the screw-threaded end of the rod.

In the views, A is the ordinary base or box S is a coiled spring encircling the rod and in- 25 on which feed grinding mills are usually terposed between the flange f and the washer mounted, and B is a three-armed base-plate f, and f is a collar rigidly fastened to the resting on and secured to the box. 0 G O are brace-rod and lying against the outer face of three pinions pivoted to the base-plate at the flange f, whereby any desired tension may points equidistant from its center, and G is a be put upon the spring S, when the brace-rod 8o 30 gear pivoted at the center of the base-plate is free from tensile strain. If power be apand engaging the three gears O C C. plied to the free end of the sweep to move it D is the internallygeared rim of a rotating in the direction indicated by the arrow (1/ of grinding-shell, the shell being supported by Fig. 1,the effect is to strain the brace-rod in suitable means resting on the base-plate and the direction indicated by the arrow a, Figs. 8 5 3 5 its internally-geared margin being in engage- 1. and 2, and to compress the spring S, which ment With thethree gears O O O. In the mill thus forms a cushion interposed between the of which these parts are elements a grindingsweep and the rotating element of the mill. ing-cone (not shown in the drawings) is fast- In practice, with a sweep of ordinary length ened to the central pinion C, and the rotation and a spring affording such resistance as we 40 of the shell in the direction indicated by the believe to be best adapted for the purpose, arrow on its periphery rotates the cone in the we have found that the force required to start opposite direction through the movement of a two-horse grinder compressesthe. spring the pinions O 0 indicated by the arrows on about two inches, the free end of the sweep their respective faces. having moved about twelve or fourteen inches 45 The details of construction thus far enumerbefore the rotating element of the mill begins ated are not essentialtoour invention, but are to turn. The force applied to the sweep is merely shown as parts of a grinding-mill havthus opposed by a yielding resistance, and the ing a rotating element (which in this case is impulse applied to the sweep is not accomthe shell D) adapted to be turned by means panied by any shock either to the sweep or 5 of sweeps fastened to it, and any other form the team. The consequence is that a comof mill embodying such rotating element paratively light sweep-bar may be used without any danger of breakage, and we have found, in fact, that a sweep having the construetion shown and described is much less liable to break than the rigid sweep having double the material.

The special means shown for making a cushioned connection of the rod F to the lug of the grinding-shell may evidently be varied without affecting theprinciple or operation of our invention, and we desire, therefore, not to limit the invention to the forms shown; but,

Having now described and explained it, what we claim as new, and desire to secure by Letters Patent, is-

1. The combination of the rotating element of a mill provided with oppositely-placed marginal. lugs, a sweep-bar pivoted to one of said lugs, a brace-rod extending from the free end of the sweep-barto the other lug, and a springeonneetion interposed between the brace-rod and said second lug and oltering a yielding resistance to ten sile strain upon the bracerod, substantially as and for the purpose set forth.

2. The combination, with the rotating shell D, provided with the lugs E E, of the sweepbar F, pivoted to thelug E, a braeerod 1!", ex tending from the free end of the sweepbar to the lug E, and a spring interposed between a washer f 011 the brace-rod and a ilangef on the lug E, and adapted to be compressed by tensile strain upon the brace-rod, substan tially as and for the purpose set forth.

' E E, of a sweep-bar l pivoted to the lug E, a

brace-rod l1", attached at one end to the sweepbar and at its other end passing through a flange f on the lug E, a nut N, engaging the screw-threaded end of the brace-rod, a spring S, interposed between the nut N and theinner face of the llangef, and the collarf, rigidly fastened to the brace-rod and normally in eontact with the outer face of the liangejiwhereby the tension of the spring S maybe readilyadjusted by turning the nut N, substantially as and for the purpose set forth.

In. testimony whereof we have signed this specification in the presence of two subscribing witnesses.

\VILMER S. LAMB. \VlLlllAM l. EMMER' Witnesses:

Ron'r. ll. \VILEs, .T. A. (11-min. 

